* { box-sizing: border-box; }

html { font-size: 62.5%; }

:root {
    --blue: var(--color-primary);
    --blue-dark: var(--color-primary-dark);
    --border: #e2e8f0;
    --text-body: #1e293b;
    --text-label: #374151;
    --text-muted: var(--color-text-muted);
}

/* ── Base ── */
body {
    margin: 0;
    font-family: 'Poppins', Arial, sans-serif;
    min-height: 100vh;
    min-height: 100dvh;
    background: linear-gradient(160deg, #eff6ff 0%, #eff6ff 55%, #e0e7ff 100%);
    display: flex;
    align-items: stretch;
}

/* ── Back link ── */
.back-home {
    position: fixed;
    top: 1.6rem;
    left: 1.6rem;
    width: 3.8rem;
    height: 3.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--blue);
    text-decoration: none;
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(37, 99, 235, 0.15);
    border-radius: 50%;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    z-index: 100;
    transition: background 0.2s, box-shadow 0.2s;
}
.back-home:hover {
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.12);
}

/* ── Page layout ── */
.login-page {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

/* Brand panel — desktop only */
.login-brand { display: none; }

/* Card fills full screen on mobile */
.login-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8rem 2.4rem 4rem;
    background: #fff;
}

/* Mini logo shown on mobile */
.card-logo {
    width: 5.6rem;
    height: 5.6rem;
    margin-bottom: 1.6rem;
}

/* ── Headings ── */
h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--blue);
    margin: 0 0 0.4rem;
    text-align: center;
}

.auth-sub {
    font-size: 1.4rem;
    color: var(--text-muted);
    margin: 0 0 3.2rem;
    text-align: center;
}

/* ── Form ── */
.login_form {
    width: 100%;
    max-width: 36rem;
    display: flex;
    flex-direction: column;
    gap: 1.8rem;
}

.field-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

label {
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--text-label);
    display: block;
}

.input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrap input {
    width: 100%;
    height: 4.8rem;
    border: 1.5px solid var(--border);
    border-radius: 1.2rem;
    background: #fff;
    padding: 0 4.4rem 0 4.4rem;
    font-family: 'Poppins', Arial, sans-serif;
    font-size: 1.5rem;
    color: var(--text-body);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.input-wrap input:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.input-wrap input::placeholder {
    color: #c0c9d6;
}

.input-icon {
    position: absolute;
    left: 1.4rem;
    width: 1.8rem;
    height: 1.8rem;
    pointer-events: none;
    stroke: #9ca3af;
    flex-shrink: 0;
}

.pwd-toggle {
    position: absolute;
    right: 1rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.4rem;
    display: flex;
    align-items: center;
    height: auto;
    width: auto;
    border-radius: 0;
}
.pwd-toggle svg { stroke: #9ca3af; transition: stroke 0.15s; }
.pwd-toggle:hover svg { stroke: #6b7280; }

.forgot-link {
    font-size: 1.3rem;
    color: var(--blue);
    text-decoration: none;
    text-align: right;
    display: block;
    margin-top: -0.6rem;
    transition: opacity 0.15s;
}
.forgot-link:hover { text-decoration: underline; opacity: 0.8; }

/* ── Submit button ── */
.login_form [type="submit"] {
    width: 100%;
    height: 5rem;
    border: none;
    border-radius: 9999px;
    background: var(--blue);
    color: #fff;
    font-family: 'Poppins', Arial, sans-serif;
    font-size: 1.6rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 0.4rem;
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
    padding: 0;
}
.login_form [type="submit"]:hover {
    background: var(--blue-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.28);
}
.login_form [type="submit"]:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ── Auth switch ── */
.auth-switch {
    font-size: 1.3rem;
    color: #6b7280;
    text-align: center;
    margin-top: 2.4rem;
}
.auth-switch a {
    color: var(--blue);
    font-weight: 600;
    text-decoration: underline;
}

/* ── Error messages (injected by login.js into .input-wrap) ── */
.field-error {
    display: block;
    font-size: 1.2rem !important;
    color: #ef4444 !important;
    margin-top: 0.4rem;
    padding-left: 0.4rem !important;
    width: auto !important;
    max-width: none !important;
}

/* ── Desktop (≥780px) ── */
@media (min-width: 780px) {
    body {
        background: linear-gradient(145deg, #1d4ed8 0%, #2563eb 50%, #4338ca 100%);
    }

    .login-brand {
        display: flex;
        flex: 1;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2.4rem;
        padding: 4rem;
    }

    .brand-logo {
        width: 10rem;
        height: 10rem;
        filter: brightness(0) invert(1);
    }

    .brand-name {
        font-size: 5.6rem;
        font-weight: 800;
        letter-spacing: 0.1em;
        color: #fff;
        margin: 0;
        line-height: 1;
    }

    .brand-tagline {
        font-size: 1.7rem;
        color: rgba(255, 255, 255, 0.78);
        text-align: center;
        line-height: 1.8;
        margin: 0;
        max-width: 28rem;
    }

    .login-card {
        width: 52rem;
        min-width: 52rem;
        flex: 0 0 52rem;
        min-height: 100vh;
        border-radius: 0;
        padding: 4rem 5.6rem;
        box-shadow: -24px 0 64px rgba(0, 0, 0, 0.14);
        justify-content: center;
    }

    .card-logo { display: none; }

    h1 { font-size: 3.2rem; }
}

/* ── PHP redirect toast ── */
.toast {
    position: fixed;
    bottom: 2.4rem;
    left: 50%;
    transform: translateX(-50%) translateY(2rem);
    background: #1f2937;
    color: #fff;
    padding: 1.2rem 2.4rem;
    border-radius: 9999px;
    font-size: 1.4rem;
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s;
    z-index: 9999;
    white-space: nowrap;
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
.toast.toast-error { background: #ef4444; }